Just barely meet

Algebra Level pending

If the parabola y = − x 2 + b x − 8 y=-x^2+bx-8 has its vertex on the x x -axis, then which of these answer choices is a characteristic of the value of b b ?

a positive integer a positive rational number a negative irrational number a positive or a negative irrational number a positive or a negative rational number

Paul Fournier by Paul Fournier , 70, Canada

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